dead front master cylinder

[KxRider250]

My front brake just decided to stop pushing fluid one day.

I replaced the plunger, spring and the 2 rubber seals that are on the plunger. I also disassembled the seal on the inside of the reservoir and cleaned everything in the parts washer.

What else is there to do??? It still does not push any fluid :bang:

 

[KxRider250]

Could this just be a huge air bubble? or is there something else that could be damaged?

 

[Rich Rohrich]

Assuming you assembled the master cylinder correctly then it's just a matter of getting all the air out, which can be kind of tough. Sometimes it's necessary to raise the caliper above the master cylinder to get the air to move. Tapping the master cylinder with the handle of a screw driver while bleeding can help move the air as well.